The aim of this article is to study in depth the changes taking place in the habits of adolescents using online communication, particularly due to the dramatic arrival of social networks in their daily lives, and the sociocultural implications of these processes. The research methodology focuses on a selfadministered questionnaire applied nationally. Based on the results of a survey of a representative national sample of 2,077 adolescents (12 to 17yearolds), this study has sought to update the information about online practices among Spanish adolescents, specifically with regard to the remarkable development of social networks. Similarly, the behavior of both regular users of social networks and of nonregular users has been compared, with the aim of detecting the influence of social network use on general online life, and we have considered the following variables: gender, age, funding type of the educational establishment and social class. Among the main conclusions of the study, we emphasize a more intensive use of the Internet as regards time and activities by those who are more frequent users of social networks, and especially the activities they carry out to keep in touch and share content with their equals.

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